Model is underconstrained.
The following variables couldn't be defined:
 * cp in component Ca_concentration_in_the_dyadic_space
 * I_rel in component release_current
 * I_d in component diffusion_current
 * i_Ca in component L_type_Ca_channel
 * I_tr in component transfer_current
 * a_infinity in component release_current
 * tau_a in component release_current
 * cf_nsr in component transfer_current
 * I_Ca in component L_type_Ca_channel
 * Po in component L_type_Ca_channel
 * M in component L_type_Ca_channel
 * gamma in component L_type_Ca_channel
 * V in component membrane
 * d_infinity in component L_type_Ca_channel_d_gate
 * alpha_d in component L_type_Ca_channel_d_gate
 * beta_d in component L_type_Ca_channel_d_gate
 * alpha_f in component L_type_Ca_channel_f_gate
 * beta_f in component L_type_Ca_channel_f_gate
 * f_infinity in component L_type_Ca_channel_f_gate
 * I_NaCa in component Na_Ca_exchanger
 * Nai in component intracellular_Na_concentration
 * I_up in component uptake_current
 * beta_ci in component calcium_buffering
 * beta_cs in component calcium_buffering
 * I_trpn_i in component calcium_buffering
 * I_trpn_s in component calcium_buffering
 * I_r in component Ca_flux_out_of_the_SR
 * N in component Ca_flux_out_of_the_SR
 * Q in component Ca_flux_out_of_the_SR
 * s in component Ca_flux_out_of_the_SR
 * A in component Ca_flux_out_of_the_SR
 * m in component membrane
 * x in component membrane
 * T in component membrane
 * a in component intracellular_Na_concentration
 * b in component intracellular_Na_concentration
 * T in component intracellular_Na_concentration
 * d/dt cp in component Ca_concentration_in_the_dyadic_space
 * d/dt cf_jsr in component Ca_concentration_in_the_local_JSR
 * d/dt a in component release_current
 * d/dt q in component L_type_Ca_channel
 * d/dt d in component L_type_Ca_channel_d_gate
 * d/dt f in component L_type_Ca_channel_f_gate
 * d/dt CaTi in component calcium_buffering
 * d/dt CaTs in component calcium_buffering
 * d/dt cs in component Ca_concentration_in_the_submembrane_space
 * d/dt ci in component Ca_concentration_in_the_cytosol
 * d/dt cj in component total_Ca_concentration_in_the_SR
 * d/dt cj_ in component average_Ca_concentration_in_unrecruited_JSR_compartments